Trait BlueprintMutate

pub trait BlueprintMutate<M, S>: BlueprintInspect<M, S>
where
    M: Mappable,
    S: KeyValueMutate,
{
    // Required methods
    fn put(
        storage: &mut S,
        key: &M::Key,
        column: S::Column,
        value: &M::Value,
    ) -> StorageResult<()>;
    fn replace(
        storage: &mut S,
        key: &M::Key,
        column: S::Column,
        value: &M::Value,
    ) -> StorageResult<Option<M::OwnedValue>>;
    fn take(
        storage: &mut S,
        key: &M::Key,
        column: S::Column,
    ) -> StorageResult<Option<M::OwnedValue>>;
    fn delete(
        storage: &mut S,
        key: &M::Key,
        column: S::Column,
    ) -> StorageResult<()>;
}

It is an extension of the BlueprintInspect that allows mutating the storage.

Required Methods

fn put( storage: &mut S, key: &M::Key, column: S::Column, value: &M::Value, ) -> StorageResult<()>

Puts the key-value pair into the storage.

fn replace( storage: &mut S, key: &M::Key, column: S::Column, value: &M::Value, ) -> StorageResult<Option<M::OwnedValue>>

Puts the key-value pair into the storage and returns the old value.

fn take( storage: &mut S, key: &M::Key, column: S::Column, ) -> StorageResult<Option<M::OwnedValue>>

Takes the value from the storage and returns it. The value is removed from the storage.

fn delete(storage: &mut S, key: &M::Key, column: S::Column) -> StorageResult<()>

Removes the value from the storage.

Object Safety

This trait is not object safe.

Implementors

impl<M, S, KeyCodec, ValueCodec> BlueprintMutate<M, S> for Plain<KeyCodec, ValueCodec>

where M: Mappable, S: KeyValueMutate, KeyCodec: Encode<M::Key> + Decode<M::OwnedKey>, ValueCodec: Encode<M::Value> + Decode<M::OwnedValue>,

impl<M, S, KeyCodec, ValueCodec, Metadata, Nodes, Encoder> BlueprintMutate<M, S> for Merklized<KeyCodec, ValueCodec, Metadata, Nodes, Encoder>

where M: Mappable, S: KeyValueMutate + StorageMutate<Metadata, Error = Error> + StorageMutate<Nodes, Error = Error>, KeyCodec: Encode<M::Key> + Decode<M::OwnedKey>, ValueCodec: Encode<M::Value> + Decode<M::OwnedValue>, Encoder: Encode<M::Value>, Metadata: Mappable<Key = DenseMetadataKey<M::OwnedKey>, OwnedKey = DenseMetadataKey<M::OwnedKey>, Value = DenseMerkleMetadata, OwnedValue = DenseMerkleMetadata>, Nodes: Mappable<Key = u64, Value = Primitive, OwnedValue = Primitive>, for<'a> StructuredStorage<&'a mut S>: StorageMutate<Metadata, Error = Error> + StorageMutate<Nodes, Error = Error>,

impl<M, S, KeyCodec, ValueCodec, Metadata, Nodes, KeyConverter> BlueprintMutate<M, S> for Sparse<KeyCodec, ValueCodec, Metadata, Nodes, KeyConverter>

where M: Mappable, S: KeyValueMutate + StorageMutate<Metadata, Error = Error> + StorageMutate<Nodes, Error = Error>, KeyCodec: Encode<M::Key> + Decode<M::OwnedKey>, ValueCodec: Encode<M::Value> + Decode<M::OwnedValue>, Metadata: Mappable<Value = SparseMerkleMetadata, OwnedValue = SparseMerkleMetadata>, Nodes: Mappable<Key = MerkleRoot, Value = Primitive, OwnedValue = Primitive>, KeyConverter: PrimaryKey<InputKey = M::Key, OutputKey = Metadata::Key>,